Date: Fri, 20 Dec 2013 11:26:59 -0800 From: Neel Natu <neelnatu@gmail.com> To: Benjamin Kaduk <bjkfbsd@gmail.com> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r259641 - in head/sys/amd64: amd64 include vmm/intel Message-ID: <CAFgRE9HxkjHuP21hEwyL09iNz_w3QdmOVnQbHoXmMXvYeZtwTQ@mail.gmail.com> In-Reply-To: <CAJ5_RoA4G_Vx%2BXJM8kSTeSn=D%2BEFQMY7YWwVYLYO=u6gFq07Ow@mail.gmail.com> References: <201312200550.rBK5oNmw098487@svn.freebsd.org> <CAJ5_RoA4G_Vx%2BXJM8kSTeSn=D%2BEFQMY7YWwVYLYO=u6gFq07Ow@mail.gmail.com>
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Hi Ben, On Fri, Dec 20, 2013 at 10:27 AM, Benjamin Kaduk <bjkfbsd@gmail.com> wrote: > On Thu, Dec 19, 2013 at 9:50 PM, Neel Natu <neel@freebsd.org> wrote: >> >> Author: neel >> Date: Fri Dec 20 05:50:22 2013 >> New Revision: 259641 >> URL: http://svnweb.freebsd.org/changeset/base/259641 >> >> Log: >> Re-arrange bits in the amd64/pmap 'pm_flags' field. >> >> The least significant 8 bits of 'pm_flags' are now used for the IPI >> vector >> to use for nested page table TLB shootdown. >> >> Previously we used IPI_AST to interrupt the host cpu which is >> functionally >> correct but could lead to misleading interrupt counts for AST handler. >> The >> AST handler was also doing a lot more than what is required for the >> nested >> page table TLB shootdown (EOI and IRET). > > > This represents a KBI change, does it not? Should __FreeBSD_version be > bumped? > I was under the impression that a bump would be required only if this change is MFCed to a stable branch. I could be wrong about this and if so would be happy to rectify it. best Neel > -Ben
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